– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 9 pm Tue 17 Feb Local TimeUpdates in: hr min sUpdate imminent
Issued: 9 pm Tue 17 Feb Local Time
Updates in:
Update imminent hr min s
Issued: 9 pm Tue 17 Feb Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 1°C on Fri afternoon, min -5°C on Wed night). Wind will be generally light. | Days 5–7 Weather SummaryMild with light rain (total 4mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Mon morning. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | Monday 23 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | | | |  | | |  |  | | | | |  | |
some clouds | light snow | snow shwrs | some clouds | cloudy | clear | some clouds | cloudy | cloudy | cloudy | cloudy | cloudy | light rain | light rain | light rain | light rain | light snow | light snow | light snow | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 3 | 4 | |
— | — | — | — | — | — | — | — | — | — | — | — | 0.1 | 0.2 | 0.1 | 0.9 | 3 | — | — | |
max °C | -1 | 0 | 0 | -3 | 0 | -1 | -4 | 0 | 1 | 0 | 5 | 5 | 4 | 7 | 7 | 4 | 2 | 2 | 2 |
min °C | -2 | -1 | -3 | -5 | -2 | -4 | -5 | -1 | -1 | -1 | 3 | 3 | 3 | 7 | 4 | 2 | 2 | 1 | 1 |
-2 | -1 | -3 | -5 | -2 | -4 | -5 | -3 | -1 | -3 | 1 | 0 | 0 | 5 | 2 | 2 | 1 | 1 | -1 | |
300 | 400 | 450 | 0 | 250 | 450 | 0 | 300 | 600 | 200 | 1250 | 1400 | 1850 | 1850 | 1700 | 1650 | 900 | 800 | 800 | |
Cloud base (m) | 800 | 550 | 550 | 650 | 650 | 750 | 600 | 700 | 700 | 600 | 4350 | 3350 | 2650 | 2600 | 2200 | 850 | 650 | 550 | 600 |
 | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — |
 | — | — | 5:34 | — | — | 5:35 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:42 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A dusting of new snow. Freeze-thaw conditions (max 1°C on Fri afternoon, min -5°C on Wed night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mild with light rain (total 4mm) on Mon morning Becoming colder with a light covering of snow, mostly falling on Mon morning. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Fri night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.